JavaScript 省市级联效果

时间：2021-06-24 21:50:11

JavaScript 省市级联效果

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

 <html xmlns="http://www.w3.org/1999/xhtml">

 <head>

     <title>省市级联效果</title>

     <script type="text/javascript">

         function show() {

             var citys = new Array();

             citys["湖北省"] = ["襄樊市", "武汉市", "随州市", "荆门市", "黄石市", "恩施市", "咸宁市", "仙桃市", "十堰市", "孝感市", "利川市"];

             citys["湖南省"] = ["长沙市", "吉首市", "湘潭市", "益阳市", "津市市", "洪江市", "怀化市", "冷水江市", "衡阳市", "郴州市", "永州市", "邵阳市", "岳阳市"];

             citys["广东省"] = ["广州市", "深圳市", "佛山市", "汕头市", "珠海市", "韶关市", "江门市", "湛江市", "惠州市", "中山市", "东莞市"];

             citys["北京市"] = ["朝阳区", "丰台区", "崇文区", "宣武区", "海淀区", "顺义区", "平谷区", "怀柔区", "房山区", "东城区", "西城区"];

             document.getElementById("shi").options.length = 1;

             var sheng = document.getElementById("sheng").value;

             var newCity;

             if (sheng != "-=请选择=-") {

                 for (var i = 0; i < citys[sheng].length; i++) {

                     newCity = new Option(citys[sheng][i], citys[sheng][i]);

                     document.getElementById("shi").options.add(newCity);

                 }

             }

         }

     </script>

 </head>

 <body>

     <div>

         <select id="sheng" onchange="show()">

             <option value="-=请选择=-">-=请选择=-</option>

             <option value="湖北省">湖北省</option>

             <option value="湖南省">湖南省</option>

             <option value="广东省">广东省</option>

             <option value="北京市">北京市</option>

         </select>

         <select id="shi">

             <option>-=请选择=-</option>

         </select>

     </div>

 </body>

 </html>

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